Verifying machine



Sept. 3, 1935. c;l CAMPBELL 2,013,534

VERIFYING MACHINE Filed Oct. 5, 1931 5 Sheets-Sheet 2 H6 /I1'l6'7 I .IWW Mln Wc nl" Z2. l; :zi 65 65' INVENTOR- GMM Selft- 3, 1935- c. CAMPBELL 2,013,534

VERIFYING MACHINE Filed Oct. y5, 1951 5 Sheets-'Sheet 3 lm' B A'rToR Y- Patented Sept. 3, 1935 UNITED STATES PATENT oFFlcE VERIFYING MACHINE poration of New York Application October 5, 1931, Serial No. 567,065 i In Great Britain October 24, 1930 12 Claims.

'I'his invention relates to apparatus for verifying perforated record cards such as are used for controlling statistical machines, and is concerned with apparatus of the kind in which the verificar, tion is performed in stages, normally a column at a time, with the aid of a keyboard, which has escapement mechanism for causing a card carriage or a carriage carrying verifying mechanism to escape one step after each stage of the verifying operation, and means operable, when a key or keys depressed at any stage does not, or do not, correspond to the holes in the column on the card being verified at that stage, to give an indication (e. g, to lock the machine by rendering the 15 escapement mechanism inoperative) of such failure, and in which the cards are delivered to a discharge station when they have passed completely through the machine.

With such apparatus, the operator removes each verified card from the machine and adds it to a stack of verified cards. When the machine becomes locked, the card that caused the stoppage is removed and added to a stack of incorrectly punched cards, It is, however, possible for the operator to add' incorrectly punched cards and incorrectly verified cards to the stack of verified cards, and there is no means of checking the cards in this stack to' see whether they have been verified properly or at all.

` Already `it isknown to mark either the verified cards or the incorrect cards with a distinguishing imprint, but, here again, every card requires inspection before being passed for machining, i. e. including such operations as balancing, sort-, o ing and posting accounts.

With apparatus in which the machine is locked when the verifying operation fails to correspond with the hole configuration of the card, an error key is provided for releasing this lock and permitting the verifying operation to continue if the error has been made by the operatorv of the verifying apparatus. l

With this construction, however, it is possible for operators, when the machine locks, to try separate keys alternately with the error key until the key corresponding to the hole in thecard is 'depressed and the carriage allowed to escape. Consequently, the machine may allow carriage movement with the presence of an incorrect hole and so pass an incorrect card as being fully verified. One object of the present invention is to remove this possibility by making a permanent record on a wrongly verified card.

Another object of the invention is to effect a physical change in such cards as have successfully passed the verifying test by specially perforating the card in a definite place so that a bulk check by needling `can be made and incorrect cards sorted out from the correct cards before they are used to control other machines.

Another object of the invention is to ensure that vthe whole field of the card is operated on to prevent the verifying operator from checking the last few columns in the final field and passing a partially verified cardas being fully verified.

According to the present invention there is provided verifying apparatus of the kind above described which includes a device arranged automatically to punch a hole or notch in the card in a predetermined position on the completion of a verification operation when the keys operated during the said operation correspond to the hole configuration on the card.

According to another feature of the invention the said punching device may be arranged automatically to operate when the key or keys operated at any stage of the verifying operation fail to correspond to the hole configuration in the column on the card being verified to indicate that the column has not been correctly verified.

Conveniently, initiating means are provided, automatically operable to operate the punching device on completion of the verification of the last column in the card in addition to error indicating means for automatically suppressing the operation of the punching device when the key or keys depressed during any stage of the operation fail to correspond to the hole configuration on the column of the card being verified. Conveniently, the error indicating means is so operatively connected to the punching device as to bring it into action when the key or keys depressed do not correspond to the hole configuration in a column to make a record on the card of such failure in verification. 40

Since, however, it may be undesirable or inconvenient to punch a hole or notch in a card when it fails to be verified, there is preferably provided, according to another feature of the invention, manually operable means (e. g, a switch) 4,.

lto interrupt the said operative connection between the error indicating means and the punching device at will. l n

It is desirable to ensure that the whole field of the card will be tested during a verifying operation and, according to another feature of the invention therefore, verifying apparatus as above described includes means whereby the punching device cannot be actuated if the card has not been correctly positioned prior to verification. 55

Conveniently, such means comprises a pair of contacts and means associated with the carriage for closing the said contacts when the said carriage is in the correct position for starting a verifying operation. The last mentioned means are preferably adjustable with respect to the carriage 'to enable a verifying operation to be commenced at any stage on the card when the information prior to that stage is'not required to be verified.

According to a further feature of theinvention the verifying apparatus has means adjustable by the punching device when operated to render the latter inoperable and also adjustable by the carriage on its movement to the correct position for starting a verifying operation to render the punching device again operable.

Other features of the invention will appear hereinafter and will be pointed out in the appended claims.

An embodiment of the invention will now be described with reference to the accompanying drawings which illustrate, by way of example, a verifying apparatus for punching a hole in a predetermined position in correctly verified cards and arranged so that the said hole is not punched in the predetermined position when the card has not been correctly verified.

On the drawings:

Fig. 1 is a sectional elevation on the line of Fig, 3 showing the card carriage and the keyboard situated thereabove for testing the correctness of the card;

Fig. 2 is a section on the line 2-2 of Fig. 3 and illustrates, in a diagrammatic form, the apparatus used for punching the special hole in the card under conditions hereinafter described;

Fig. 3 is a section on the line 3-3 of Fig. 1;

Fig. 4 is a fragmentary view which illustrates diagrammatically the construction used to ensure that the device for punching the special hole in the card indicating correct verification will be inoperable unless the card has been correctly' positioned prior to verification;

Fig. 5 is a wiring diagram of the circuits used in the apparatus.

Referring to Figs. 1, 3 and 5 the record card to be verified is inserted between the card pusher and a forward guide |2 with the first column of the card coinciding with a column of spring pressed ball contacts i3 which are adapted to make contact through holes in the card with an insulated roller il. The pusher and the guides I2 are attached to a rack bar I5 which is suitably guided for horizontal movement. The circuits established by the balls I3 and the roller i4 through holes in the cardyln a manner described later, cause the energization of a magnet I5 which effects the movement of the card rack i5. The movement of the rack is controlled by an escapement mechanism, as described in the copending application of Weinlich and Kolm, Serial No. 459,401, filed June 5, 1930. The two escapement pawls |1 and i3 are provided of which the pawl |1 is pivotally mounted at I3 on a member 2l which isconnected by a bell crank 2| and a link 22 with the armature 23 of the magnet i0. The operation of the escapement device and the rack bar l5 is controlled by the electrical condition of the magnet I6. A

Verifying-keys 21, a skip key 2l, a' tabulating key 23 and a release key 30 (see Fig. 5) are included in the apparatus.

Figs. 2 and 3 show a suitable device for punchposition on the card. It is preferred that the punching device should make a hole of special shape, such as triangular, since such a hole is harder to counterfeit. By packing the cards together and passing a needle through the holes it can be ascertained whether all the cards that are supposed to have been verified have, in fact, been verified since unverified or incorrectly verifled cards will not have a hole in the predetermined position. 'Ihe punching device illustrated in the drawings is so located that it is in position to punch a hole in the column of the card that has just been verified and in the normal case this punching operation takes place after the last column in the card has been verified. In this way, the predetermined hole is punched in one of the four corners of the card which facilitates the needling operation above described.

This punching operation is controlled by the successive energization of the electrical magnets |09 and Ii respectively. The controlling circuits for these magnets will be described later. When the magnet |09 is energized it attracts its armature I i which is in the form of a bell crank pivoted at |2. The angular movement of the armature moves a punch interposer ||3 longitudinally under the hammer member i I6 which has a xed pivot |1 and is pivotally connected at I i8 to the member 20. As the punch interposer ||3 moves under the hammer ||6 it rotates the bell crank |20 about its xed pivot |2| to lift the link |22 connected to the bell crank |20 and close the contacts |23. For this purpose the link |22 is provided with a nose |24. Closure of the contacts |23 completes, as hereinafter described, a momentary circuit through the escapement magnet i6 which thereupon attracts its armature 23, through the link 22, bell crank 2| and member 20, pulls the hammer IIS down upon the punch interposer ||3 and also drives the punch |25 vertically downward through the guide |26 into the die |21 which has a triangular aperture |28 corresponding to the shape of the punch |25. The card, during this movement, is stationary between the guide |26 and the die |21 and a hole is consequently punched. The link 22, during its longitudinal movement when the armature 23 is attracted, pushes, by means of the stop |29, the nose I 24 of the link |22 out of engagement with the spring pressed contacts |23 which immediately open to deenergize the magnet I0. The armature 23 is returned to its normal position by suitable springs, not shown, and in this return movement operates the stop |30 on the link 22 to close contacts 39 and open contacts 40 for the purpose hereinafter described. It will be seen that when the armature 23 is attracted, the contacts 30 open and the contacts 40 are closed by the same stop |30 and further that unless the punch interposer magnet is energized before the magnet I0, no punching will take place when |0 is energized. In this way carriage movement which is controlled by the escapement magnet I6, can be initiated without punching a hole.

Movement of the link 22 and the stop |30 also controls the opening or closing of the contacts 65, Il' (see Fig. 3). The purpose of these contacts will be described later.

In Fig. 4 is illustrated a convenient construction for ensuring that the card carriage has travelled over a prescribed field of the card during `the verifying operation to permit the verification hole to be punched. In the drawings the contacts III and |03 are adapted to be momentarily and` open the contacts and |04.

`through the normally closed contacts 39.

closed as the card is positioned to present its commencing data to the roller |4 and spring pressed balls |3. For this purpose the contacts H-'and |04 are made when the flap |3| pivotson the bearing |32 yand. |33. The ap is stationary with respect to the card carriage and is moved angularly by the member |34 which is pivoted on the block |35 adjustable o n the stationary rack |36. The block |35 and the member |34 constitute a tabulator stop and the block is held in any adjusted position by internal teeth registering with teeth on the rack |36. -To close the contacts |00 and |04the card carriage is moved until the abutment |31 acts on one end of the pivot member `|34 as shown in chain dotted lines in Fig. 4. When this happens, the member |34 moves angularly and raises the pivoted flap |3| to close the` contacts. When, however, the card carriage moves under the control of the escapement magnet I6, the end of the member |34 which was acted upon by the abutment |31 isrelcased, due to movement of the carriage and abutment |31 toward the left, and allows the flap |3| to fall The circuits controlled by the last mentioned contacts will be described with reference to the wiring diagram. It will be appreciated that by adjustlng the block |35 along the stationary rack |36 it is possible to pass over a predetermined field of the card which does not require to be verified but control of the machine is initiated immediately such predetermined field has been passed. Thel wiring diagram A number of relays 44, 45, 46, 41, 48, and 49 are shown and a pair of vcontacts 35 for each key 21 is provided. A further relay 5| is associated with the tabulating key 29 and the release key 30. The contacts associated with the various relays will, for convenience, be given the same number as the relay followed by a dash, double dash, triple dash or quadruple dash as the case may be. The various relays are of conventional construction, being 7provided with the usual springs (not shown) to return their associated contacts to normal position upon deenergization of the relays. The operating current of the apparatus is derived from the mains 52, 53. The main 52 is connected to the roller I4 through a wire 54 and normally closed contacts 55. The circuit is continued through the ball contacts |3, contacts 35 to the relay coil 44 and thence to the other main 53. If there is a hole in the card column in line with the balls |3 and the roller I4, the circuit is completed through the contacts 35, corresponding to the holeL position in which the hole occurs. Ihe magnet 44 is thus energized and opens its contacts 44 and then closes its contacts 44", the closure of which energizes the relay coil 45 The coil 45 then closes the contacts 45 and .45 and the latter forms a holding circuit for the relay coil 45. This holding circuit becomes effective as soon as the contacts 44" are opened and this occurs on the depression of the key 21 corresponding to the hole position in which the hole occursin the card because depression of the key opens the corresponding contacts 35 and breaks the circuit through the relay coil 44 which is deenergized. The contacts 44 closed upon deenergization of coil 44 and the contacts 45 being both now closed, a circuit is established through the magnet I6 by way of the normally closed contacts 49 and 65 to permit the card carriage to be advanced one step. The armature 23 of the magnet |6 is attracted and opens the contacts 39 (see Fig. 2) to deenergize the relay 45 and a1- low the contacts 45 and 45 to open. This is the normal operation of the machine during each verifying stage when the hole conguration in the columnbeing verified corresponds with the keys depressed.

If the key which is depressed does not correspond to the position of the hole in the card col- 4relay coil is not energized so that the ,coil 45 remains de energized and the contacts 45 remain open, Once again, the magnet |6 is not energized and the card carriage fails to escape.

When a card column should properly be blank the skip key 28 is depressed and its contacts 28 are closed. If there is no holein the column, the relay coil 44 will not be 'energized and consequently a circuit will be made from the main 52 through the closedcontacts 44', contacts 28', normally closed contacts 49' and the coil of the escapement magnet |6 and the normally closed contacts 65 to the line 53. The card carriage is thus permitted to escape one step. If, however, there is a hole in the skipped column,'relay coil 44 will be energized and the contacts 44 opened so that no circuit can be completed through the cscapement magnet. Depression of the key 26 would therefore have no effect.

The circuits of the machine are arranged so that, if any key is depressed and released without the magnet 6 being energized, the relay contacts 49 are opened to interrupt the circuit for the escapement magnet |6 and are held open until the error key 69 is depressed. In this connection it is to be noted that, as shown on Fig. 1 of the drawings, the contacts 31 and 38 are operated when anyof the keysl 21 is depressed or when the skip key 28 is depressed.

The contacts 49 are controlled by the relay coil 49 which in turn is controlled by the contacts 66, 46 and 41". The circuit for this coil extends from the line 52, through the normally closed contacts 66, a relay coil 49, contacts 46" and contacts 41K to the line 53. The coil 41 is normally energized over a circuit extending from the line 52, through the contacts 66, contacts 31, coil 41 to the line 53 and holds its contacts 41l closed and its contacts 41' open as shown in Fig. 5. The coil 46 is normally deenergized and its contacts 46 are open so that the circuit for the coil 49 is normally broken. The coil 48 is normally deenergized so that its contacts 48 and 48 are in the positions shown in Fig.i5. As previously pointed out the contacts 31, 38 are shifted from the position shown in the drawings when any key 21 or when the skip key 28 is depressed. 'I'he contacts 31 then open the circuitvth'rough the relay coil 41 which is deenergized so that its contacts 41 close and contacts 41" open. Concurrently, a circuit is established between the mains through the contacts 66, the contacts 38 now closed, the relay coil 46, and the contacts 48 normally closed. The relay coil 46'is thus energized and closes its contacts 46 and 46". The contacts 46 complete a holding circuit for the coil 46 round the contacts 36 and through the contacts 48.

If the column being verified at any stage is correct the magnet I6 is energized and attracts its armature 23 as shown in Fig. 2 of the drawings and closes the contacts 40. In such a case the relay coil 48 is energized through a/circuit extending from the line 52, contacts 40, relay coil 48 and contacts 41' to the line 53. The contacts 48" then close to establish a holding circuit for the coil 48 while the contacts 48 open and break the circuit for the relay coil 46.

The contacts 46 and 46" thus both open so that when the key 21 is released and the contacts 38 open and the contacts 31 close, the coil 41 is reenergized and closes its contacts 41" and opens its contacts 41. Since the coil 46 has been deenerglzed its contacts 46" are open and therefore closure of the contacts 41" does not energize the relay 49. The opening of the contacts 41 deenergizes the relay 48 and the relays are restored to their normal condition.

If, on the other hand, the column being verified is incorrect, the magnet I6 will not be energized and the contacts 40 will not be closed. Thus, when the depressed key 21 is released, the contacts 48' will still be closed and the relay coil 46 will be held energized through the contacts 46 and 48 after the contacts 38 open. Thus, the contacts 46 will be closed, when the relay coil 41 is reenergized by the closure of the contacts 31 and, in turn, closes the contacts 41". The relay coil 49 is then energized over the circuit previously traced through the contacts 46" and 41", both of which are now closed. The coil 49 opens its contacts 49 in the circuit for the magnet |6 so that the latter cannot be energized and closes its contacts 49 to provide a holding circuit for the coil 41 extending from the line 52, the contacts 66, the contacts 49", and the coil 41 to the line 53.Y The depression of any key 21 will now have no effect since the magnet |6 cannot be energized and since the relay coils 46 and 4'I are held energized independently of the contacts 31 and 38. These circuits are more fully described in the application referred to above.

The tabulator and release keys 29, 30 also operate as described in such application. The relays 46, 41 and 49 may be restored to their normal condition by depressing the error key 69 and opening the contacts 66 which are in the holding circuits for these relay coils. The card may then be removed or, if the operator has depressed the wrong key 21, the correct key may be depressed.

The above described arrangement is substantially that disclosed in the prior application No. 459,401. However, it will be seen that one disadvantage of the construction so far described is that it permits the verifying operator, when a wrong key has been depressed or when a wrong hole occurs in the card, to depress the error key 69 and the keys 21 alternately until the escapement magnet is energized as described above.

An arrangement will now be described for ensuring that when a wrong key is depressed or, alternatively, when a wrong hole occurs in the card, the verifying distinctive notch or hole will not appear on the card being veried when the error occurred.

First of all, however, it is necessary to provide means for ensuring that a prescribed or predetermined number of verification stages will be carried out on the card. For this purpose a convenient construction is previously described with reference to Fig. 4. The closure of the contacts when the card is correctly positioned energizes the relay coils |0| and |02 which are maintained through the relay contacts |0|' and the normally closed contacts 49' which are controlled by the error detecting relay 49 above described. The contact |04 energizes the coils |05 and |06 which are maintained through the relay contacts |06' and the normally closed contacts |08 and 65'. Contacts |0|' and |05 are closed upon energization of their respective relay coils |0| and |05 and remain closed until their controlling coils are deenergized. It is necessary to provide holding circuits for the relays |0|, |02, |05 and |06 since the contacts |00 and |04 are only momentarily closed when the card is in correct position a'nd immediately on the movement of the card carriage are opened. The relay coils |02 and |06 hold the contacts |02 and |06' respectively closed. When the card carriage or its equivalent has passed the complete band of punched data over the verifying sensing devices I3, |4 the contacts l0 are closed by the energization of the escapement magnet to allow the last column to pass the devices I3 and I4.

Conveniently, this could be effected by an abutment ||0a (Fig. 1), on the card carriage closing the contacts ||0 during this nal movement. In other words, after the last card column has been verified the carriage will be in its extreme left hand position and contacts ||0 will be closed thereby. On the closure of the contacts ||0 a circuit is established through the punch interposer magnet |09 from the line 52 to contacts ||0, contacts |02', contacts |06', coil |09 normally closed contacts 65' and |08 to the line 63. As described above with reference to Fig. 2 of the drawings, energization of |09 permits a hole to be punched in the card when the magnet I6 is energized in succession to the coil |09. As previously described, the coil |09 attracting its armature closes the contacts |23 and thus completes a circuit through the escapement magnet |6 to permit the armature 23 of the escapement magnet rst of all to punch a hole and then open the contacts |23 to deenergize ltself. When the coil |09 attracts its armature it opens the contacts |08 and it is held energized through the contacts 65 until the escapement magnet has itself been energized to punch the hole. As the armature 23 is attracted it opens the contacts 65 and 65 to deenergize the escapement magnet |6 and the group of relays |0|, |02, |05 and |06 respectively. Deenergization of coils |02 and |06 opens the contacts |02 and |06' permanently. The circuits of the machine are now restored to a normal position for another verifying operation. In this way, all correctly veried cards have a hole automatically punched in them in a predetermined position.

When the error indicating relay 49 becomes energized under any of the conditions above described, it opens the contacts 49" and breaks the circuit through the relays |0| and |02. Deenergization ot these relays opens contacts |0|' and |02 respectively. Thus, even although the error key 69 is depressed to deenergize the error indicating relay 49 and permit the card carriage to escape.it is not possible for relays |0| and |02 to become reenergized during this continued movement, because the contacts |0| cannot be closed. The effect of this is that it is not possible normally to establish a circuit through the punch interposing magnet |09 and the card will be discharged from the machine without the verifying hole in the predetermined position.

The alternative to carrying on the operation e error occurs;

, ||4 andthe normally open contacts 49. the switch |14v is closed and an error occurs in the by depression of the error key is for the operator to return the card to the correct initial position and, so close the contact which permits |0| and |02 to be reenergized. It is, of course, necessary to press the error key when the second l `to indicatethe column on the card at which the For this purpose it isnecessary tobridge the contactsV 0 and |02 by a parallel i -circuit through the manually operable Aswitch When cardthe contacts 49 are closed by the enervgization of the error detecting relay I9. As above described, y relays |0|, 02 arede'energized but relays -|06 and |05 are not deenergized so thata circuit is established through the punch interposing magnet .|09 fromthe line 52, through the f y switch II, lcontacts9f", contacts |06', relay g coil |09 and normally closed contacts 65. ,Energization of the relaycoil |09 initiates a punching- .operation at the column at which the error has occurred as has been described above. 'Ihis punching operation'deenergizes the relays |06 and by opening theco'ntacts 65 and Asince |08 is deenergized the contacts |06 are opened so that although depression ofthe error key followed by correct key operations of keys 21 allows the card carriage to continue to move the card past the verification rdevices I3' and I4, 'no further circuit can be established through the punch lnterposing magnet |09. The result is that the card will be removed from the machine without g the, verification hole and vwith a' holapunched at the column of the card in which the error occurred. This will permit the=oifending card to be examined and the blame for 'the error attached either to the person" who punched the initial information on the card o r tothe records from which the information 'was punched on to 'the cards or to the operator of 'the verifying apparatus.

The error punching scheme just described is made optional since in some cases it would not be desirable to have the card disfigured by holes punched in other than the predeterminedpostion.

While there has been shown and described and pointed out the fundamental novelfeatures of the invention as applied to a single modification, it will be understood that various omissions and substitutions and changes in the form and details of the. device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as in` of said marking device as an incident to the nonverification of a card columnwhereby a mark will'be made in the non-verified column.

2. In a verifying machine, having record card to said analyzing mechanism for verification, a marking device and a controlling circuit therefor, means controlled by said carrier, when in position to present the first column of the card to be veried to the analyzing mechanism, for partially closing the controlling circuit of .said marking device, further means controlled by said carrier for completing the controlling circuit of the marking device after the last column of the card has been presented to said analyzing mechanism, and means controlled by said analyzing and verifying mechanism for preventing the completion of the operation of said marking device upon the nonveriiication of one or more of the card colunms analyzed.

3. In a verifying machine, a plurality of card analyzing devices adapted to cooperate with the' columns of a perforated record card, a marking device located adjacent to said analyzing )devices and adapted to enter a mark upon a record-card, verifying key contacts, a circuit running through said analyzing devices and said contacts and means adapted to be-made effective under control of said circuit for causing said marking device to create a mark adjacent to an analyzed column.

analyzing and verifying mechanism, a-*card carrier movable to present a card, column by column whenthe perforations therein do not correspond cooperating therewith, a card carrier, a verifying circuit adapted to lbe broken under control of said devices and key contacts upon the non-verification of a column of a record card, a marking device and a controlling circuit therefor; means controlled by the movement of said carrier to complete said controlling circuit, and means operated conjointly with the breaking of said verifying circuit to prevent the completion of said marking device controlling circuit.

`6. In a verifying machine, analyzing means adapted to sense the perforations in a record card, column by column, key operated means cooperating with, said analyzing means to verify the correctness of the perforated entries in said card columns column by column, a marking device; means controlled by said analyzing means and 'said keys for automatically effecting an operation of said marking device as an incident to the nonverifcation of`a card column, said mark being made in said non-verified column and manually operable means to interrupt said operation at will.

v 7. In a device of the character described, having sensing elements, a punch and an operating magnet therefor, a circuit for said magnet including normally open contacts, a relay for operating said contacts, a circuit for said relay including contacts., a lcard carrier adapted to close said last named contacts when in position to present .the first card column to be verified to the sensing elements, whereby said relay will be-energized to 'close the contacts in said punch magnet cirfcard analyzing devices and verifying key contacts cuit; a holding circuit for said relay including a pair of normally closed contacts, and means 'controlled by the operation of said punch for opening said contacts to interrupt the circuits for said controlling magnet and said holding circuit.

8. A perforated record verifying machine comprising analyzing mechanism for analyzing perforations in a record card, key operated means cooperating with said analyzing means for verifying the perforations column by column, a marking device and means controlled by said verifying means for causing said marking device to automatically effect a mark in a column of the card as an incident to the non-verification of said column.

9. A verifying machine comprising in combination, a circuit, analyzing means adapted to ini tially close said circuit through perforations in a record card, key operated means for opening said circuit, a marking device and further means operated conjointly with said key operated means for automatically effecting an operation of said marking device if said circuit fails to open upon operation of said key operated means.

10. In a verifying machine the combination with means for advancing a perforated record card and means for verifying the perforation in said card column by column, of a punching device and means controlled by said verifying means for 'causing said punching device to automatically effect a perforation in non-verified columns of the record card.

l1. In a machine of the class described having means for analyzing perforations in the columns of a record card, a carriage for the card, means for advancing said carriage step by step to successively present a predetermined number of card columns to said analyzing means, a punch and means rendered effective by said carriage after the pre-determined number of columns has traversed said analyzing means for causing an operation of said punch, key operated means associated with said analyzing means adapted to verify the perforations analyzed in the columns of the card column by column and means controlled by said verifying means for rendering said punch operating means ineffective.

l2. In a machine of the class described, in combination, means for analyzing the representations in the columns of a record card, associated key operated means for verifying the analyzed representations column by column, a punch and controlling means rendered effective by said verifying means for actuating said punch to make a perforation in a non-verified column and further controlling means for actuating said punch to make a perforation in a xed location on the card upon verication of all the columns analyzed, said last named controlling means being rendered ineiective as an incident to the operation of said punch in a non-verified column.

CHARLES CAMPBELL. 

